Search	Explanation
stability AND formul* stability formul*	These two searches are the same. They both find any articles containing stability and any term beginning with formul.
modeling OR simulation	Finds articles containing either term.
waveform (modeling OR simulation)	Finds articles containing waveform and either modeling or simulation
waveform NOT acoustic	Finds articles containing waveform but not acoustic.
"data acquisition"	An example phrase search.
Note: boolean operators are capitalized for clarity only.